>> Works if you supply the correct include path(s)
The location of Standard C headers do not need to be supplied to a conformant compiler.
>> You could arguably fault ccc's driver for not specifying the include path to find the native C library on this system.
This is not a good implementation decision for a compiler which is not the C compiler distributed with the OS. Even though Standard C headers have well-defined names and public contracts, how they are defined is very much compiler specific.
The location of Standard C headers do not need to be supplied to a conformant compiler.
>> You could arguably fault ccc's driver for not specifying the include path to find the native C library on this system.
This is not a good implementation decision for a compiler which is not the C compiler distributed with the OS. Even though Standard C headers have well-defined names and public contracts, how they are defined is very much compiler specific.
So this defect is a "somethingburger."